How do I access internet through 2G [Lumia 630, Airtel India]?

[HELL RAISER1]

Guys, I am from India, facing some problem & need your help.
I am using AIRTEL in my L630. It was working great!!! No problems at all. But since the day before yesterday I am nt able to access internet through AIRTEL 2G. not at all. But I can use it only through 3G which eats up battery faster. I used that SIMcard in my android device. 2G was working great on it. Then I tried tried IDEA 2G in L630 & I was able to access internet through 2G. Today I soft reseted my phone but still not able to access internet through AIRTEL 2G. PLEASE HELP ME GUYS!!! Thanks in advance

 

[prasath1234]

Go for sim setting nd choose manually your service provider there will be Airtel 2g as option.
From Windows phone

 

[HELL RAISER1]

I did but still the same. I have connection but not able to access through airtel 2G, did my phone hard reset. now nokia cam lens, battery saver update option got vanished